The caption along the top of the postcard somewhat identifies the scene. It reads: “Mt. McIntyre as seen from the Flowed Lands in the Adirondack Mts., NY.” Some simple online research points to both a reference of a Mount McIntyre, which has on that mountain Algonquin Peak (5,114 feet/1,559 metres), the second highest peak in New York State; and also a reference to the MacIntrye Mountains/Range, which includes Iroquois, Mount Marshall, Wright, and Algonquin. The mountain seems to be considered in Newcomb, NY.

I was not sure where the “flowed lands” is supposed to be that the viewer is looking from, but I was able to discover this information, which identified the lake, which is also considered to be in Newcomb:

“Flowed Land was created in the mid-nineteenth century by the owners of the McIntyre Iron Works in an effort to channel more water past their blast furnaces. A dam was erected on the Opalescent River below Lake Colden, causing most if not all of the Opalescent’s flow to be diverted down Calamity Brook […]. This Brook meets the Hudson just below Lake Henderson, and just above the MacIntyre’s furnaces. The dam on the Opalescent was damaged by a 1979 flood, and partially breached in 1984 by the NYS Department of Environmental Conservation due to safety concerns.” (Adirondack-Park.net)

As to the date of the postcard, the Museum on Blue Mountain Lake has the same postcard in their collection and they date it to the 1940s.

The back side of the postcard does not have much of interest on it, but take a look yourself below: